Police slap the driver who seem to be slipping in and out of consciousness.The driver was dressed in jeans and white shirt and wore a thick beard.A victim could be seen lying motionless close to where the car came to a stop.

Moments later a 32-year-old man was arrested on the steps of Flinders Street Station.

The second man being arrested at the steps in front of Flinders Street Station. (9NEWS)

The car, being driver by the man who is an Australian citizen of Afghan descent, went through a red light and mowed down commuters and Christmas shoppers.

A photo taken by a bystander following the driver's arrest. (Supplied by Dave Snowden)Aerial footage shows the damage to the car as shocked pedestrians look on. (9NEWS)

Eerie aerial footage shows the injured laying on the ground after the rampage.